Windlass



(No Moda.) 2 sheetssheet 1.

E. 8.-, P.' E. PERKINS.

WINDLASS.

No. 425,185. Patented Apr. 8, 1890.

n /////fj//////,

,mn-m N Jevwn l ATTORNEYS.

2 Sheets-.Sheet 2.

E. an F. E'. PERKINS.

(No Model.)

WINDLASS.

Patented ApInB, 1890.

ffm

A WITN'ESSES @ma @Q.

ATTORNEYS.

UNITED STATES ELIAB PERKINS AND FREDERICK E. PERKINS, OF

ST. JOSEPH, MISSOURI. i

WINDLASS.

SPECIFICATION forming part of Letters Patent No. 425,185, dated April 8, 1890.

Application led April 6, 1889. Renewed March '7,

To all whom it may concern:

Be it known that we, ELIAB PERKINS and FREDERICK E. PERKINS, of St. Joseph, in the county of Buchanan and State of Missouri, have invented a new and useful Improvement in Windlasses, of which the following is a specification.

Our invention consists in a new and improved windlass, which will be hereinafter fully described and claimed. Y

Referring to the accompanying drawings, Figure l is a side elevation showing our new and improved windlass in position in the wall of a building, the wall being broken away to better illustrate the construction and arrangement of our invention. Fig. 2 is a vertical sectional view taken `through the windlass; and Figs. 3 and at are detail views, which will be hereinafter referred to.

The same letters of reference indicate corresponding parts in all the igures.

Referring to the several ignating letters, A indicates a tubular journal-box, which Inay be formed of gas-pipe, in which the operating-shaft B of the windlass Iits and revolves. This tube is .shown in Fig. l, passing through the wall of a building, so that while the windlass proper and chain are on the outside the windlass can be operated from the inside of the building'.

Against the outer side of the building-wall is secured by long bolts C C a metallic frame or casting D. ln this frame D are journaled two sprocket-wheels E and F, one of which is shown in detail in Fig. 3 of the drawings. The out-er end of shaft B is passed through the lower part of the frame tD, and the lower wheel E is mounted upon the said end so as to revolve therewith. The wheel E may be secured on the shaft either by a pin e or by squaring that part of the end of the shaft. Above the wheel E is journaled in the frame D the other sprocket-wheel F, mounted and turning' on a bolt or short shaft Gr. Upon the inner square end of the shaft B is secured a crank or operating handle H.

The outer end of the tube A is lthreaded exteriorly to enable it to be screwed into the inner side of the frame D at CZ, as shown, while upon the inner threaded end of the tube is secured a disk I, which serves to hold parts by their des- 1890. Serial No.343.Q66. (No model.)

the tube from slipping or working out of po- Sition.

Upon the inner side of the building-wall is secured a metal plate or bracket J, having a central aperture through which the inner end ofthe operating-shaft passes, and upon this end of the shaft, between the bracket .I and crank H, is secured a ratchet-wheel K. A pawl L is secured against the outer side of the bracket, so as to engage with the inclined teeth of the ratchet-wheel.

To enable the pawl to be manipulated from the outside of the building, it is secured upon the inner end of a rod M, which passes through the wall and has a bent outer end, as shown, for convenience in operating, so that the windlass can be operated from the outside of the building. l

The sprocket-wheels E and F, over'and between which the chain passes, are formed at one end with the teeth, which mesh so that when the lower wheel is revolved on and by the operating-shaft it will rotate the upper wheel F. The chain N passes partially around and between the two sprocket-Wheels E F in an S shape, and is securely held from slipping by recesses O in the center of the grooved sprocket wheels, alternating with projections P at the sides of the grooves. The form of these recesses and projections are clearly shown in the enlarged detail View, Eig. 3, of the drawings, illustrating one of the said sprocket-wheels. that one link will iit in a recess O, while the next is held by the projections P, and so on throughout the length of that part of the chain which is in contact with the two wheels. It will be seen that by this construction the chain is iirmly held and grasped from the time it comes in contact with the wheels until it passes clear of them.

The great advantage of our invention lies in the fact thatwe obtain a powerful windlass in which we can use an ordinary chain of any length with but little friction and no increase of resisting leverage, such as is caused by bunching up a chain on a windlass winding coil after coil on each other, as in a dru1n-windlass. vWe thus obtain the maximum of power with the minimum of friction and effort. The windlass occupies lt will be seen IOO but little space, is com pact, and very ellicient. The chain is in contact with one-half ot cach wheel at the same time, equal to the entire surface of one wheel, dividing the pulling or lifting strain equally between the two wheels, and avoiding anypossible chance of the chain slipping or pulling off the windlass. The two stops Q R allow the chain to move the 'equired distance only. The stops prevent the chain from being wound oil' the wheels, and also throw the strain on the chain and windlass instead of on the object being moved. rlhis last overcomes a great dilliculty.

The lower stop Q consists of a ring passed through and secured in one of the links of the chain below the windlass, as shown, while the upper stop R is formed of a fiat strap of metal bent to form the ring end R2, and the end R bent at right angles, this stop being riveted on each side of a link of the chain above the windlass, as shown. This upper stop will, be sides acting as a stop, serve to prevent the chain from twisting as it slides along the face of the wall, and when this is not practicable the loop end R2 will slide up and down on a rod S, fastened at each end in the wall, as shown in Fig. l.

The crank or operati11g-handle can be used on the outside of the building, when required, by extending the outer end of shaft ll and securing the crank on that end.

XVe are enabled by our construction to employ very small sprocket-wheels instead of the large and heavy sprocket-wheel usually employed in other constructions. VWhen greater power is required, the lower sprocketwhccl 'lil journaled on a bolt-spindle like the upper one, and a small cog-wheel is keyed on the outer end of the shaft B, so as to mesh with wheel E. The wheels E and F then revolve slower, but with greater force. This modified arrangement is not illustrated, but will be readily understood.

I `ro1n.the foregoing description, taken in connection with the accompanying drawings, the construction, operation, and advantages of our invention will be readily understood.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is#

l. The combination ot the frame, the two sprocketwheels, the chain, the tubulaijournal-box, the driveshatt having the ratchetwheel, the pawl, and the operating-rod for the same extending through the wall of the building and adapted to be operated from the outside thereo'l, substantially as set forth.

2. In a windlass, the combination, with the two rotatable sprocket-wheels, of the chain having the upper and lower stops, substantially as set forth.

In a windlass, the combination, with the two rotatable sprocket-wheels, of the chain having the upper and lower stops and the guide-rod for the upper stop, substantially as sot forth.

LL. s

ELIAB PERKINS. FminERH/'K E. PERKINS. \Vitnesses:

GILBERT J'. SPENCER, JAMES W. Pwr'rs. 

